Chongqing is a very large inland city in South-West China. It is one of only 4 municipalities in China controlled directly by the central government. It perhaps sums up quite well Chinese development, the city has grown exponentially and the municipality of Chongqing now has a population of 31.4 million. It is quoted by many sources as being the worlds largest municipality in both physical size and in terms of population.
The city of Chongqing served as China's capital city during World War II and the war against the imperial Japanese armies. Today it serves an economic purpose, being the hub of economic activity in the upper Yangtze region. The urban population or the actual city population is around 5 million at a density of 382 people per square kilometer. The cultural background of Chongqing is mainly "Han" with around 91% of people being of Han ascendancy.


Other problems include organized crime, in 2009 4893 suspected criminals were arrested for organized crime. However, Chongqing's most prevalent problem is its huge water pollution levels in the nearby rivers and tributaries in addition to the heavy air pollution which both the UN and the EU quote as being unsafe.